PROCESSING OF RED MUD

Red mud obtd. as a residue from alumina prodn. by the Bayer method is suspended in water together with burnt lime and substances contg. humic acid or its derivs. (coal, brown coal, peat etc). whereby most of the alkalis contained in the red mud pass into the soln. in the form of alkali humates. The...

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Bibliographic Details
Main Authors BELA GALAUNER, LASZLO WAGNER, LASZLO DZIDA, FERENC LAZAR, ALFRED POGANY, LASZLO KAPOLYI, GYORGY VAMOS
Format Patent
LanguageEnglish
Published 07.06.1973
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
CONCRETE
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
LIME, MAGNESIA
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
REFRACTORIES
SLAG
TREATMENT OF ALLOYS OR NON-FERROUS METALS
TREATMENT OF NATURAL STONE
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Summary:Red mud obtd. as a residue from alumina prodn. by the Bayer method is suspended in water together with burnt lime and substances contg. humic acid or its derivs. (coal, brown coal, peat etc). whereby most of the alkalis contained in the red mud pass into the soln. in the form of alkali humates. The soln is then separated from the solids and can be utilised for the prodn. of alkali carbonates, alkali hydroxides and/or a fertiliser. The solid carbonates, which contains 1.5% of alkalis can now be utilised for the prodn. of iron by reduction and smelting. The remaining slag can be used for the prodn. of cement, opt. after leaching out the residual alumina, which can be recovered. The reduction of the alkali content of the red mud below 1.5% makes it possible to utilise the red mud in the above way on a large scale.
Bibliography:Application Number: AU19710036466